Avogadro number = 6.02 × 1023
Therefore , time taken for distributing the grains
= (6.02 × 1023 x 1) / 1010 = 6.023 x 1013 s
By Converting these seconds into years, we get
= (6.023 x 1013) / (60 x60x24x365)
= 1,90,9800 y
Hence, the time taken would be 1.909 x 106 years.